Two things:
In the first sense, مسبب is wrong. Both senses are about a person who is anorexic; one is an adjective, and one is a noun.
I recommend using مصاب بالقهم العصبي or مصاب بالقهم العصابي for both. فقدان الشهية is not clear as it could be understood as "loss of appetite."
In the first sense, مسبب is wrong. Both senses are about a person who is anorexic; one is an adjective, and one is a noun.
I recommend using مصاب بالقهم العصبي or مصاب بالقهم العصابي for both. فقدان الشهية is not clear as it could be understood as "loss of appetite."